| error[E0723]: function pointers in const fn are unstable (see issue #57563) | |
| --> $DIR/cmp_fn_pointers.rs:1:14 | |
| | | |
| LL | const fn cmp(x: fn(), y: fn()) -> bool { | |
| | ^ | |
| | | |
| = help: add #![feature(const_fn)] to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0723`. |